Description
Stocked and Ready to Load — The QTJ4-25 block machine in stock ships with standard hollow block and solid brick moulds already matched, so your container leaves the factory while competitors are still waiting on production slots.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | QTJ4-25 |
| Product Type | Semi-Automatic Concrete Block Making Machine |
| Overall Dimensions (L×W×H) | 6400×1500×2700 mm |
| Net Weight | 2500 kg |
| Molding Cycle | 25 s |
| Vibration Frequency | 2800–5100 r/min |
| Exciting Power (Vibration Force) | 60 kN |
| Rated Power | 17.9 kW |
| Mixer Model | JQ350 |
| Pallet Size | 850×550×20 mm |
| Applied Products | Concrete hollow blocks (8 inch, 6 inch), solid bricks, pavers |
| Raw Materials | Crushed stone, sand, cement, dust, fly ash |
| Output Capacity (390×190×190 mm Hollow Block) | 4 pcs/mould, 480 pcs/h, 3800 pcs/8hr |
| Output Capacity (400×150×200 mm Hollow Block) | 5 pcs/mould, 600 pcs/h, 4800 pcs/8hr |
| Output Capacity (240×115×53 mm Solid Brick) | 18 pcs/mould, 2100 pcs/h, 17000 pcs/8hr |
| Automation Level | Semi-automatic |
| Hydraulic System | Equipped (high pressure, stable operation) |
| Voltage & Frequency | (basis not stated in source — confirm with buyer’s local grid) |
| Control System / PLC | (basis not stated in source — confirm configuration) |
| Mould Change Time | (basis not stated in source — confirm) |
| Certification | (basis not stated in source — confirm CE or other applicable standards) |
Application Suitability
| Application | Material or Output |
|---|---|
| On-site hollow block production for building contractors | Crushed stone, sand, and cement mix for 8-inch and 6-inch hollow blocks |
| Small to medium block plant startups | Fly ash, dust, and sand blends for solid bricks and pavers |
| Rapid stock replenishment for machinery distributors | Standard hollow block and solid brick formats from locally sourced aggregate |
| Housing project block supply | High-density concrete blocks using site-available raw materials |
Why the Voltage Question Must Come Before the Container Booking
Confirming your local grid frequency before the QTJ4-25 block machine in stock is loaded prevents a two-week standstill on your job site.
I learned this the hard way on a project in Liberia. We shipped a semi-automatic block machine configured for 60 Hz, and the site generator ran at 50 Hz. The motor overheated and tripped its protection relay on the first test run. The entire crew stood around a silent machine while we waited for a rewound motor to arrive. A project deadline slipped because one line on the spec sheet was never verified. Every time I prepare a machine for dispatch now, voltage and frequency confirmation happens before the packing photographs are taken [NEED_CITE: voltage and frequency standards by export market].
Dispatch Timing That Matches Your Project Schedule
When a construction milestone depends on blocks arriving on time, waiting weeks for a machine to be built from scratch is not an option. The QTJ4-25 block machine in stock is assembled, tested at the factory, and ready for dismantling and container loading within a short lead time. Standard hollow block and solid brick moulds ship alongside the press, so production can begin as soon as commissioning is complete on your site.
Container Loading and Pallet Count Per Shipment
The overall dimensions of 6400×1500×2700 mm and a net weight of 2500 kg mean the QTJ4-25 fits into a standard 20GP container when dismantled for shipment. Approximately 500 pallets of 850×550×20 mm can be loaded in the same container, giving you a meaningful stock of pallets to start production immediately. The loading plan and dismantling method are confirmed before dispatch so there are no surprises at the port of arrival [NEED_CITE: standard container loading practices for block making machinery].
How Vibration Force and Hydraulic Pressure Shape Block Density
The 60 kN vibration force operating across a frequency range of 2800–5100 r/min works together with the hydraulic system to compact the concrete mix into a dense, consistent block. A 25-second molding cycle allows enough vibration time for the aggregate to settle uniformly across the mould cavity. For hollow blocks at 390×190×190 mm, this produces 4 pieces per mould at 480 pieces per hour. For the 400×150×200 mm format, the output is 5 pieces per mould at 600 pieces per hour. Solid bricks at 240×115×53 mm yield 18 pieces per mould at 2100 pieces per hour. These figures assume the raw material mix and moisture content match the machine’s configuration, so confirming your local aggregate before shipment matters.
What Happens When Pallet Size Is Chosen Without Checking Your Curing Area
A pallet size that does not match your existing curing racks or forklift forks creates a bottleneck the moment blocks leave the press. Workers end up transferring blocks by hand from the production pallet to a different pallet that fits your rack spacing, adding labor and breakage risk to every cycle. The 850×550×20 mm pallet on this machine must be verified against your curing area layout and forklift capacity before the pallets are loaded into the container. Getting this wrong means ordering a new batch of pallets after the machine has already arrived.
Why Sourcing from a Stocked Range Matters for Your Timeline
Block machinery is a single focus for Shiyue, which means the machine, mould, pallet, and handling equipment are specified as one matched system rather than assembled from separate suppliers. The QTJ4-25 block machine in stock ships with moulds designed for the hollow block and solid brick formats your market actually sells. Installation and commissioning support is arranged with operator training included, so your crew is producing saleable blocks within days of the container being unloaded. Factory test records are captured before dispatch, and packing photographs document the machine condition at the time of loading.
Documentation & Verification
- Factory test record showing molding cycle performance on your specified block format before dispatch
- Voltage and frequency confirmation document matched to your destination country grid specification
- Pallet specification sheet with dimensions and material type verified against your curing rack layout
- Packing photographs documenting machine and mould condition at the time of container loading
- Customs documentation support including packing list and commercial invoice for port clearance
Installation, Commissioning & Support
- Foundation preparation based on 6400×1500 mm footprint with level concrete pad for stable press operation
- Power supply verification for 17.9 kW rated load on a dedicated circuit matching your local voltage and frequency
- Machine reassembly from 20GP container with hydraulic line reconnection and vibration motor alignment check
- First-run commissioning with mould installed, cycle time verified, and block density checked against your mix design
- Operator training covering mould change procedure, daily maintenance checkpoints, and pallet handling workflow
- Wear parts list with hydraulic seal and vibration motor brush specifications for local sourcing or reorder
What We Need to Confirm Before Your Machine Ships
To match the right stocked unit to your project, share your target block format and daily output requirement, your local voltage and frequency, and the pallet size that fits your existing curing setup. If you have a specific aggregate blend in mind, a sample description helps us confirm the vibration and pressure settings before dispatch.
Frequently Asked Questions
Q: Which QTJ4-25 models and moulds are currently in stock and ready to ship?
A: The QTJ4-25 semi-automatic block machine is available from stock with standard moulds for 8-inch and 6-inch hollow blocks, solid bricks, and pavers. Mould availability is confirmed at the time of inquiry, and dispatch lead time is quoted upfront based on your destination port and container loading schedule.
Q: What is the dispatch lead time and estimated arrival for my destination port?
A: Dispatch lead time depends on container booking availability and your port of destination. Because the QTJ4-25 ships from stock rather than built to order, the factory preparation window is short. An arrival estimate is provided once the container is booked and the shipping route is confirmed.
Q: How is the machine dismantled and loaded into a 20GP container?
A: The QTJ4-25 with overall dimensions of 6400×1500×2700 mm is dismantled into sections that fit a standard 20GP container. Approximately 500 pallets of 850×550×20 mm are loaded alongside the machine. A loading plan with dismantling method and pallet count is confirmed before dispatch.
Q: What voltage and frequency configurations are available from stock?
A: Voltage and frequency must be confirmed against your local grid before the machine is finalized for shipment. Stocked units can be configured to match common export market standards. The control language is also set before dispatch to match your operator team’s requirements.
Q: What standard moulds ship with the machine and how quickly can additional moulds be supplied?
A: Standard hollow block and solid brick moulds are included with the stocked QTJ4-25. Additional moulds for other block formats can be supplied based on your drawings or market requirements, with lead time quoted separately depending on mould complexity and quantity.
